Most of them are Tear Jerker, but in one of them, you ride through a roller coaster equipped with a pair of hands, operated by the boy on the missing poster.
And as if we didn't have enough proof that whatever's down there is going to be disturbing. There's just enough ambiguity at this point that all this could mean anything, but it probably doesn't mean anything pleasant. In Alpha 4, the basement features some kind of shadow-like humanoid monster.
The mysterious basement? What's in it? Alpha 2 implies the Neighbor is keeping a woman and her children down there, along with what appears to be tools for a Hollywood Satanism-style ritual.When you turn around and The Neighbor is right behind you, staring into your soul.